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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Domain and structural characterization of tyrosine phosphorylation sites in cancer cells
 Vávra, Dan ; Novotný, Marian (advisor) ; Brábek, Jan (referee)
Phosphorylation is an important mechanism for regulation of protein function and aktivity. Tyrosine phosphorylation plays a critical role in signaling pathways. Aberrant tyrosine phosphorylation was observed in many cancer types. My work follows patological details of tyrosine phosphorylation sites of lung and colorectal cancers. Point of view includes aminoacid sequence, secondary structure, domain localization, expression, model organism ortholog occurrence. The project is based on analysis of literary informations and data from protein databases. There are no new phosphorylation sites in observed cancer types. Regular secondary structures, α-helices and β-sheets, are significantly phosphorylated in compare with loops. Annexin and Kinase domains are the most phosphorylated. Gene expression change of phosphorylated proteins occurs in observed cancer cells. Powered by TCPDF (www.tcpdf.org)
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The influence of estrogens on mouse sperm capacitation and acrosome reaction in vitro
 Tejnická, Magda ; Komrsková, Kateřina (advisor) ; Linhart, Otomar (referee)
There are an increasing amount of compounds in the environment that can have a negative effect on reproductive parameters in both male and female organism. There has been a worldwide decline of sperm quality during past decades and this fact lead to an increase of unnatural ways of conception through assisted reproduction techniques in the specialised centres. Natural estrogens are one of these compounds and they get into waste water after being excluded from the body by the urine. They get back into the human body from drinking water or from the food, and they can interfere with function of endogenous hormones in very low concentrations. For these reasons it is up to date to deal with the influence of these compounds on mammalian sperm. For many years, estrogens have been considered typically female sex hormones. It is now certain that they are also very important in the regulation of male reproduction. Endogenous estrogens in mammalian males are an important part of the endocrine system. Estrogens play an important role in the development of germ cells, spermatogenesis and processes leading to successful egg fertilization such as a capacitation or acrosomal reaction. Tyrosine phosphorylation is one of the essential steps for the properly ongoing process of capacitation in sperm followed by a...
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